ER40 Collet 3/8" (.375-.359) Mechanical Coolant Seal
ER40 Collet 31/32" (.969-.938)
ER40 Collet 4.0mm (.157-.118)
ER40 Collet 5.0mm (.196-.157)
ER40 Collet 5.5mm (.216-.212)
ER40 Collet 5/16" (.312-.281)